<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css基本语法</title>
    <!-- 外部样式表 -->
    <link rel="stylesheet" href="css_01.css">
    <!-- 内部样式表 -->
    <!-- <style>
        h1{
            color:red;
            font-size:5em;

        }
    </style> -->

</head>
<body>
    <!-- 内联样式表-->
    <h1 style="color: orange;">对h1标签更改显示</h1>
    <h1 id="my_title" class="h1_color" style="color: red;">继承与层叠</h1>
</body>
</html>